If you ask where the prestigious private schools are in San Antonio, Keystone School is almost always mentioned.

This school is interesting because it doesn't stand out with flashy college admission results like BASIS does.

However, among locals who have lived here for a long time, especially parents interested in education, it is consistently referred to as a "really good school."

First of all, Keystone is a small private school that runs from kindergarten through 12th grade.

This means not just that the grades are continuous, but that the educational philosophy remains consistent throughout, which is key.

If a child enters when they are young, the educational style does not change significantly as they move up to middle and high school.

From a parent's perspective, this is a significant advantage as it reduces the stress of adapting every time the school changes.

Another major feature of this school is its "small size." The number of students is not large.

As a result, class sizes are small, and the distance between teachers and students is close.

This is important because it allows for "individualized attention" for each student.

Some students excel in math, while others are strong in writing or the arts, but in larger schools, it is difficult to tailor education to these differences.

However, Keystone adjusts for this. So, it is more about "raising each student's potential" rather than just "averaging out education."

The curriculum is not solely focused on raising test scores but is structured to develop both critical thinking and creativity.

In classes, there is a significant emphasis on discussion, writing, and projects rather than just memorization.

As a result, children do not just become "students who solve problems" but also develop their thinking and expression skills.

This aspect differentiates it from schools like BASIS. While BASIS focuses on speed and achievement, Keystone leans more towards depth and balance.

That said, the academic level is not low. In fact, it is quite high by the standards of top students.

Looking at SAT scores and college admission results, the rate of students going to top universities is consistently high.

Particularly, there are ongoing cases of students being admitted to Ivy League schools and competitive private colleges, leading to the perception that it is a "school that delivers results."

While there is some competition, the atmosphere is more about "supporting each other's strengths" rather than a "pushy competitive environment."

As a result, some parents prefer Keystone over a highly competitive environment like BASIS.

However, it is important to note that being a private school comes with tuition costs.

Tuition for the 2026-2027 school year

• Pre-K: $18,400
• Kindergarten ~ 4th Grade: $21,300
• 5th ~ 8th Grade: $24,100
• 9th ~ 12th Grade: $26,100

• Registration Fee: $1,400 (non-refundable, due upon registration)
• After Care:
  • Pre-K: $20 per day or $2,500 if paid annually in advance
  • Elementary: $25 per day
  • Middle School: $20 per day

And because it is small, the range of elective courses and activities may be more limited compared to larger schools.

Therefore, this school is not necessarily the "best" for everyone, but it is an excellent option for the right child.

In summary, this school offers personalized education in a small setting, has a curriculum that fosters creativity and critical thinking, and consistently produces strong academic results.

While it may not have a flashy exterior, it is a school that is solidly built when you look at its substance.